Of the current olympic distances which men's world track record will last longest?
I think it will be the 1500m.
I believe Bolt will beat the 1,2,& 4 in next 5 years.
Bekele could in 5 and 10k (less likely than Bolt though)
I think Kaki could maybe beat the 800
I don't see any of the current crop of guys getting close.
I don't know enough about hurdles (but cuban guy in 110 is wr holder & still currently competing so may take it down)
400h and steeple I definetly don't follow to make a guess.